Calcium is released after this substance is released following the binding of IP3 to the endoplasmic reticulum. Frederick Sanger used trypsin to determine the structure of this hormone, which binds to its receptor to increase glycogen synthesis. It is produced in the beta cells of the Islets of Langerhans in the pancreas. It is opposed by glucagon, which performs the opposite effect by increasing blood glucose levels. For 10 points, name this hormone lacked by sufferers 
Calcium is released after this substance is released following the binding of IP3 to the endoplasmic reticulum. Frederick Sanger used trypsin to determine the structure of this hormone, which binds to its receptor to increase glycogen synthesis. It is produced in the beta cells of the Islets of Langerhans in the pancreas. It is opposed by glucagon, which performs the opposite effect by increasing blood glucose levels. For 10 points, name this hormone lacked by sufferers of diabetes mellitus.
Calcium is released after this substance is released following the binding of IP3 to the endoplasmic reticulum.
insulin